What I really want to know is, what happens if I think the vaccine will only do me good and I continue to think so while hearing about negative effects that are

What I really want to know is, what happens if I think the vaccine will only do me good and I continue to think so while hearing about negative effects that are being reported. That is, is there a chance that my subconscious will subject me to nocebo because of that, even though my conscious thoughts have a positive attitude? And furthermore, could thinking about the possibility of nocebo cause my body to experience it?